After all, my logical opinion (and some others) was right the OM-D sensor is Panasonic (same as on G3)

Dpreview text:

"
The camera is built around a 16MP Four Thirds sensor, which all out testing suggests may well be the same one seen in Panasonic's DMC-G3
. This can only be seen as a welcome step forward, as it's a much newer and more capable sensor. The sensor is combined with the company's latest, TruePic VI processor, which appears to bring the usual Olympus magic to the JPEGs. The company claims improved dynamic range and, with an newer sensor and better processing, it's reasonable to expect better performance in terms of noise. And, since dynamic range is the range between highlights and a specified noise level, this would be considered a boost in dynamic range."